Mode Control Function - Panasonic MN101L Series User Manual

4.2 Mode Control Function

This LSI operates in one of the following 5 modes (NORMAL/SLOW/HALT/STOP/IDLE). The CPUM controls
the mode transition. LSI reset or interrupts make the LSI recover from STANDBY mode (HALT/STOP).
Figure:4.2.1 shows the transition between each operation mode.
For detail of transition between operation mode, VDD18 voltage and clock, refer to [4.4 Mode/Voltage/Clock
Transition]
STOP mode
STOP0 mode
HCLK: stop
SCLK: stop
STOP1 mode
HCLK: stop
SCLK: stop
*1 Oscillation stabilization wait time
is automatically inserted.
*2 When changing from the state that SCLK
is stopped, oscillation stabilization wait time
is inserted.
*3 Ensure adequate time for oscillation stabilization
by program.
Do not perform the transition that is not listed in Figure:4.2.1.
.. ..
CPU operation mode
NORMAL mode
HCLK : CPU operation
SCLK : oscillation/stop
*1
IDLE mode
HCLK : oscillation *3
SCLK : CPU operation
SLOW mode
HCLK : stop
SCLK : CPU operation
*1
Figure:4.2.1 Transition between Operation Modes
*2
*1
*1
*1 *2
*2
*1
HCLK : High-speed oscillation clock
SCLK : Low-speed oscillation clock
Reset
Clock/ Mode/ Voltage Control
HALT mode
HALT0 mode
HCLK: oscillation
SCLK: oscillation
/stop
HALT2 mode
HCLK: stop
SCLK: oscillation
*2
HALT1 mode
(HALTMOD=0)
HCLK: stop
SCLK: oscillation
HALT3 mode
(HALTMOD=1)
HCLK: stop
SCLK: oscillation
Mode Control Function
Chapter 4
IV - 13